Amido \A*mi"do\, a. [From {Amide}.] (Chem.) Containing, or derived from, amidogen. [1913 Webster] {Amido acid}, an acid in which a portion of the nonacid hydrogen has been replaced by the amido group. The amido acids are both basic and acid. {Amido group}, amidogen, {NH2}. [1913 Webster]